Asomugha, 31, played his college ball at Cal and entered the NFL with the Oakland Raiders, who selected the 6-foot-2, 210-pound cornerback with the 31st overall pick in the 2003 NFL draft. Asomugha developed into one of the league's elite cornerbacks, earning Pro Bowl nods from 2008 through 2010, despite posting just one interception in each of those three seasons.

Asomugha signed a five-year, $60 million contract with the Philadelphia Eagles following the 2011 lockout, but appeared to have lost a step in the speed department. The Eagles also stuck with a zone scheme, ignoring that Asomugha's main strength is his unique length that he uses to jam receivers at the line of scrimmage. In 31 games with the Eagles, Asomugha had four interceptions and 17 passes defensed.

Philadelphia released Asomugha on March 12 despite owing the veteran $4 million in fully guaranteed base salary in 2013.

Following his release by the Eagles, Asomugha drew interest from the 49ers and New Orleans Saints. With the 49ers, Asomugha is expected to be the third corner behind Carlos Rogers and Tarell Brown, but should see plenty of snaps as an outside corner in the 49ers' nickel and dime defensive packages.